{
  "manageEntity": {
    "action": "Save",
    "entityId": "1618557208",
    "entityType": "Track",
    "nonce": "0x51db195938d28863126eab81b704934b2b6aabbc2f8fd03a73f4cc51edb6bd17",
    "signature": "0xecb566ac51897f977d6ca2166c109b9679d51017f30cc32684ed45fa24d4c84d34bfbc60bba6496449de16a87a6e04197e325ca0dae073669841be4835480fcf1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}